Control switch



Aug' 22 1939.

W' C' lv-EONARD CONTROL SWITCH Filed OCT.. 5, 1957 Patented Aug. 22, 1939 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to an improved control switch and seeks, among other objects, to provide a device of this character which is` adapted for use with telephones and which will be operable for opening the electric circuit to a radio or other sound producing electric appliance when the telephone s in use, so that no disturbance will be caused during the actual use of the telephone.

Another object of the invention is to provide a control switch which may be embodied in telephones of the French type, wall type, conventional style, or the like, and which will be highly eilicient in use and very simple in construction.

A further object of the invention is to provide a control switch wherein the contacts employed will be effectively insulated from the telephone circuit so that no interference with the proper operation of either the telephone or the appliance will be experienced and the observing of polarity vwill not be necessary.

Other and incidental objects of the invention not mentioned hereinbefore will become apparent during the reading of the following description.

" 5 My invention is illustrated in the accompanying drawing, wherein.

Figure 1 is a sectional view, partly in elevation, of a telephone embodying* my improved control switch, the telephone being shown in inoperative position with the control switch closed.

Y Figure 2 is a fragmentary detail sectional view, partly in elevation, of a portion of a telephone with my improved control switch installed therein and showing the telephone in operative position and my switch in inoperative or circuit breaking position.

Figure 3 is an enlarged detail sectional View showing the manner of mounting the contacts employed in the construction of my switch.

Figure 4 is a diagrammatic view showing the manner of connecting my improved control switch in an electric circuit with a current outlet and an appliance, the appliance, in this instance, being indicated as a radio set.

Referring now more particularly to the accompanying drawing, wherein similar numerals of reference will be seen to designate like parts throughout the various views, the numeral I indicates, in general, a telephone which is of the conventional type. It should be understood that, although I have sho-wn the conventional type of telephone, I may employ the French style, or any other suitable type of telephone. The telephone includes .a base 2, a body 3, and a microphone 4,

all of conventional construction. As shown in Figures l and 2 of the drawing, the telephone is provided with a central standard 5 which extends axially of the body 3 and the base 2 throughout the major portion of their lengths and is adapted to carry the usual leaf spring control switch, ""5 indicated generally at 6. The control switch includes contact springs lI and 8 which are electrically connected in the telephone circuit. A relatively long switch spring 9 is disposed in N parallel spaced relation to the standard 5. '10

Hingedly mounted at the upper end of the body 3 of the telephone is the usual receiver hook Ill adapted to removably mount the usual receiver EI. The receiver hook includes, at its inner end, l a lug I2 which is englageable with the upper endfl portion of the switch spring 9. As seen at I3, the receiver hook is pivotally mounted at the upper end of a slot I4 provided for the purpose. It will be seen that, when the receiver is on the hook and the telephone is inoperative, the re-go ceiver hook will be in lowermost position or at right angles to the body 3 of the telephone. In this position, the lug I2 engages the switch spring 9 and urges it inwardly so that the springs l and 8 are out of engagement with each other.' j25 When the telephone is in use .and the receiver hook I0 is tilted upwardly, as shown in Figure 2, the switch spring 9 swings outwardly under its own tension and engages the springs 'I and 8 for closing the telephone circuit. if3() As best seen in Figure 3 of the drawing', there is mounted on the standard 5, near its upper end and confronting the upper end portion of the switch spring 9, a contact I5. The contact I5 is insulated from the standard 5 by means of a^35 bushing i6 .and a washer I'I, and said contact is provided with a binding screw I8 which permits the effective securing of a conductor I9. 'Ihe contact I5 may be made of silver or any other suitable material.

Mounted on the switch spring 9 and disposed to confront one end of the contact I5 is a small contact 20 which has a sharpened end 2I for making a positive connection with the Contact I5 when the switch comprising my invention is in 45 circuit closing position. The contact 20 is insulated from the switch spring 9 by means of a small sleeve 30. The opposite end of the small contact 29 is adapted to have soldered or otherwise secured thereto an end of a conductor 22. 50

By referring to Figure 4 of the drawing, a typical circuit layout may be seen. A radio is shown at 23 and the energizing conductors therefor are indicated at 24. 'Ihe energizing conductors are adapted to be plugged into a secondary outlet 55 25. The conductor 22 is connected to a terminal 26 oi the secondary outlet while the conductor I9 is connected to one terminal of a main outlet 21. A conductor 28 connects the opposite terminal of the main outlet 21 to the remaining terminal 29 of the secondary outlet 26.

It is believed that the operation of my improved control switch will be understood from a reading of the foregoing but it is thought a few remarks in conclusion, relative to the operation of the invention will be desirable.

The current will ow from one terminal of the main outlet tothe contact I through the conductor I9. When the telephone receiver is down the switch spring 9 will be urged toward the standard 5 and the contacts 29 and I5 will be engaged for closing the circuit through said contacts and through the conductor 22 to the terminal 26 of the secondary outlet and through one of the conductors 24 to the radio and back to the other of the conductors to the secondary outlet and from the remaining terminal 29 of said outlet through the conductor 28 to the main outlet, thus completing the circuit. It will be understood that when the telephone is not in use, the secondary outlet 25 will be at potential so that the radio may be switched off or on at will. Should the telephone be placed in operation, the upward tilting of the receiver hook I9 will permit the switch spring 9, as shown in Figure 2, to swing outwardly so that the contacts 2U and I5 will be separated and the circuit to the secondary outlet broken. At this occurrence the radio 23 will be silent and will remain silent until the telephone receiver is again placed on the hook and the hoo-k is moved downwardly for closing the contacts 2E) and I5.

Attention is particularly called to the fact that, inasmuch as the contacts I5 and 29 are insulated from the standard 5 and spring 9 respectively, there will be no interference with the telephone circuit nor will it be necessary to observe the polarity of the line when connecting the device in an electric circuit. If desired, one of the contacts may be mounted without insulation. This construction would, however, necessitate observing of polarity when the device was connected in an electric circuit.

It is thought that the construction and operation of my improved control switch will be clearly understood.

Having thus described the invention, what I claim is:

l. A control switch including, in Acombination with a telephone having astandard,areceiverhook and a receiver, a switch spring carried by the standard and engageable by the receiver hook, a

contact carried by the standard, a contact carried by the switch spring for cooperating with the rst mentioned contact, and circuit connections for said contacts,'said contacts being insulated from the telephone, a source of current supply, and an electric appliance, said contacts being engageable at shifting of the receiver hook to inoperative position by the receiver for closing an electric circuit from the current source to the appliance, said contacts being separable for breaking the electric circuit when the receiver hook is raised.

2. A device of the class described including in combination with a body and a telephone having a standard, a switch mounted on the standard and having springs and a switch spring, a receiver hook, and a receiver removably connected with the hook, a contact mounted on the standard, and a contact mounted on the switch spring for engagement with said nrst mentioned contact, said switch spring being engageable with the receiver hook, both of said contacts being insulated from the telephone, and circuit connections between said contacts, an electric outlet and an appliance, said contacts being separable at raising of the hook for breaking a. circuit from the electric outlet to the appliance and said contacts Vbeing engageable at lowering of the hook for closing the circuit throughV the contacts and re-establishing electric connection from the outlet to the applithe telephone circuit and being located within the confines of the body of the telephone.

3. In a control switch, the combination with a telephone having a body and a standard, a switch` having a switch spring, a receiver hook mounted on the telephone and having a lug engageable with the switch spring, and a receiver removably engageable with the hook, a contact carried by the'standard, a sleeve insulating the contact from the standard, a contact carried by the switch spring and engageable with the rst mentioned contact, means insulating said contact from said switch spring, said contacts being located within the body, and circuit connections between said contacts and an electric current outlet and an appliance, said lug being movable for shifting the switch spring and engaging the contacts for closing an electric circuit from the electric current outlet to the appliance when the receiver is on the hook, said receiver hook being movable upwardly for permitting separation oi the contacts and interrupting of the current supply from the electric current outlet to the appliance when the telephone is in use.

WELLINGTON C. LEONARD.

30 ance, all of said contacts being insulated from 

